Dynamic evolution of vanadia sites in dendritic mesoporous silica nanospheres for selective oxidation of methane to formaldehyde
Dynamic evolution of vanadia sites in dendritic mesoporous silica nanospheres for selective oxidation of methane to formaldehyde
研究概述
研究内容请参见论文原文。
谱图与表征信息
Fig. 5. (a) The Raman spectra of 4.2 V-DMSN under air atmosphere upon an increase of temperature from 30 to 500 ◦C, (b) V K-edge XANES spectra and (c) k2- weighted Fourier transforms of EXAFS spectra for V2O5 and 4.2 V-DMSN under 30 ◦C and 400 ◦C. (d) IR spectra of 4.2 V-DMSN under air atmosphere upon an increase of temperature from 30 to 500 ◦C. (e) The Pyridine-absorbed IR spectra of V-DMSN with various loadings. (f) Possible evolution of vanadium species on 4.2 V-DMSN during the thermal pretreatment.